DTC b1325
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
Device Power 1 Circuit Voltage Below Threshold
Device Power 1 Circuit Voltage Above Threshold
Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|
| B+ | B1325 03 | B1325 03 | -- | -- |
| Ground | -- | B1325 03 | -- | -- |
Circuit/system Description
The following control modules monitor the system voltage through the battery positive (B+) voltage circuits:
| • | Body Control Module (BCM) |
| • | Inflatable restraint sensing and diagnostic module (SDM) |
| • | Instrument panel cluster (IPC) |
Conditions for Running the DTC
| • | The voltages supplied to the control modules are in the range of 7-26 volts. |
Conditions for Setting the DTC
B1325 03
The control module detects a system voltage less than 9 volts 5 seconds.
B1325 07
The control module detects a system voltage greater than 18 volts for 5 seconds.
Action Taken When the DTC Sets
| • | The control module immediately disables all outputs when an out of range voltage condition has been detected, with the exception of serial data and Run/Crank relay that are disabled after a 3 minute delay. |
| • | The setting of other DTCs is inhibited. |
Conditions for Clearing the DTC
The DTC passes when the malfunction is no longer present.
Diagnostic Aids
| • | A high or low voltage value in multiple modules indicates a concern in the charging system. |
| • | Overcharging with a battery charger or jump starting can cause this DTC to set. |
Reference Information
Schematic Reference
| • | Body Control System Schematics |
| • | Radio/Navigation System Schematics |
| • | Instrument Cluster Schematics |
Connector End View Reference
Component Connector End Views
Description and Operation
Charging System Description and Operation
Electrical Information Reference (Except Opel Gt)
| • | Testing for Intermittent Conditions and Poor Connections |
Scan Tool Reference
Control Module References for scan tool information
Circuit/system Testing
- Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.
- Ignition OFF, disconnect the harness connectors of the appropriate control module.
- Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute.
- Test for less than 5.0 ohms between the ground circuit and ground.
- Ignition ON, verify a test lamp illuminates between the B+ circuit and ground.
- If all circuits test normal, replace the appropriate control module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for the appropriate control module replacement, setup, and programming.
